monomeric unit (monomer unit, mer)

https://doi.org/10.1351/goldbook.M04018
The largest @C01288@ contributed by a single @M04019@ to the structure of a @M03667@ or @O04286@.
Note:
The largest @C01288@ contributed by a single @M04019@ to the structure of a macromolecule or @O04286@ may be described as either monomeric, or by @M04017@ used adjectivally.
Source:
PAC, 1996, 68, 2287. (Glossary of basic terms in polymer science (IUPAC Recommendations 1996)) on page 2290 [Terms] [Paper]